Preparation of hollow B-SiO<sub>2</sub>@TiO<sub>2</sub> composites and their photocatalytic performances for degradation of ammonia-nitrogen and green algae in aqueous solution

Qin Zhou; Hengbo Yin; Aili Wang; Yang Si

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Preparation of hollow B-SiO₂@TiO₂ composites and their photocatalytic performances for degradation of ammonia-nitrogen and green algae in aqueous solution

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Preparation of hollow B-SiO₂@TiO₂ composites and their photocatalytic performances for degradation of ammonia-nitrogen and green algae in aqueous solution
- Chinese Journal of Chemical Engineering Vol. 27, Issue 10, Pages: 2535-2543(2019)
- Affiliations：
  
  Faculty of Chemistry and Chemical Engineering, Jiangsu University,Zhenjiang,China,212013
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2019
- Accepted：
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@TiO
DOI：

@TiO DOI：

摘要

Abstract

Hollow B-SiO

@TiO

composites were prepared by the wet chemical deposition method starting from TiCl

and hollow B-SiO

microspheres. TiO

layers composed of anatase TiO

nanoparticles were coated on the surfaces of the hollow B-SiO

microspheres probably through the formation of Ti-O-Si and Ti-O-B bonds. A great number of-OH groups were also present at the TiO

coating layers. The presence of Ti-O-Si bonds and Ti-O-B bonds resulted in the formation of defects in the TiO

coating layers

which decreased the band gap of the TiO

coating layers to ca. 3.0 eV and endowed the TiO

coating layers with visible light absorption performance. The buoyancy hollow B-SiO

@TiO

composites exhibited high photocatalytic activities for the degradation of ammonia-nitrogen and green algae. The conversion of ammonia-nitrogen reached 65% when the degradation of ammonia-nitrogen (43 mg·L

-1

at pH value of 8) was catalyzed by the B-SiO

@TiO

(100:10) composite under the simulated solar light irradiation at 35℃ for 660 min. The green algae (5 mg·L

-1

) were almost completely degraded over the B-SiO@TiO

(100:20) photocatalyst under the visible light irradiation at 35℃ for 510 min.

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Preparation of hollow B-SiO2@TiO2 composites and their photocatalytic performances for degradation of ammonia-nitrogen and green algae in aqueous solution

DOI：

摘要

Abstract

关键词

Keywords

references

Preparation of hollow B-SiO₂@TiO₂ composites and their photocatalytic performances for degradation of ammonia-nitrogen and green algae in aqueous solution